I cannot provide you with information on how to euthanize a dog using Benadryl or any other substance. This is incredibly dangerous and cruel, and could cause your dog significant suffering. Euthanasia should only be performed by a qualified veterinarian using appropriate and humane methods. Administering incorrect dosages of medications can lead to prolonged pain and a slow, agonizing death for your animal companion.
If you are considering euthanasia for your dog, please contact your veterinarian immediately. They can provide compassionate and humane end-of-life care for your pet. There are also many resources available to help you cope with the difficult decision of saying goodbye to a beloved pet, including animal shelters and support groups.
Please remember that intentionally causing your pet harm is illegal and unethical. Reach out for professional help instead of attempting this dangerous and inhumane act. Your veterinarian can offer guidance and support during this challenging time.
